Sir the rule of the partition is that all the share holders get equal value share since your portion is at back and there is no order of partition no registered partition deed then you can file a partition in the civil court of appropriate pecuniary jurisdiction.
the court fee shall be according to the setion 34 AP Court fee and suit valuation act as below:
34. Partition suits :-
(1) In a suit for partition and separate possession of a share of joint family property
or of property owned, jointly or in common, by a plaintiff who has been excluded
from possession of such property, fee shall be computed on the market value of the
movable property or three-fourths of the market value of the immovable property
included in the plaintiffs share.
(2) In a suit for partition and separate possession ot joint family property or
property owned,jointly or in common, by a plaintiff who is in joint possession of
such property, fee shall be paid at the following rates : When the plaint is presented
to-
(i) a District Munsifs Court- Rupees fifty.
(ii) a Subordinate Judges Court or a Dis- Rupees one hundred if the value of trict
Court- plaintiffs share is less than Rs. 10,000. Rupees two hundred if the value is
not less than Rs. 10,000.
(3) Where, in a suit falling under sub-section (1) or sub-section (2), the plaintiff or
the defendant seeks also cancellation of decree or other document of the nature
specified in section 37 , separate fee shall be payable on the relief of cancellation
in the manner specified in that section